Switch



Jan. 12, 1937. D. TAYLOR L 2,067,552

a SWITCH Filed July 9, 1936 Patented Jan. 12, 1937 PATENT OFFICE assists Dwight Taylor, firrstm lilo-he. liil.g neutrinos Gal:

.lltanufiseturing @ompanr, hit, a corporation ct 1 etc implication ii. ices. No. $9,783

9) ilhims {GEO This invention relates to electric switches curl particularly to some switches used in rstiio receivers and instruments where a large number of circuits must he switched. in the case of radio receivers it is desirable from a production point of view that each switch section be separately removable unri replaceable in e fool proof mannor. It frequently happens that each switch. section' contains e. large number of poles and posi tions ami it therefore necessary that each switch section he aligned with the remaining switch sections so that predetermined switch. sosilence occurs. Where one or more switch sec tlons removed for repair or replacement, it is desirable that means be provided for making it impossible to assemble the entire switch in any but the correct manner.

In accorrience with this invention simple means are provide-fil whereby the shaft on a gang switch can be removed and reinserted only when the various switch sections are correctly aligned. This means is simple, costs but little and in no way interferes with the normal'operation of the switch.

Referring to the drawing:

Figure 1 is a view of a gang switch embodying this invention.

Figure 2 is a view of one of the switch sections.

Figures 3 and t are sectional views on lines 3-3 and 4-6 respectively of Figure l; anal Figure 5 is sectional View through a stator and stator contact laws.

; The switch comprises a front plate 6 uponwhlch are mounted two spacecl bolts 2 and 3. Each of these bolts has over it a plurality of sleeves 5, l amt 8 and. corresponding sleeve sections 5' to t inclusive. Between adjacent sleeve sections there ls mounted an insulating stator plate It}. Stator plate 10 is generally circular and is provided with diametrically opposed -,extensions it and I2, containing apertures through which bolts 2 and 3 pass. Stator l0 has the interior portion'li cut out thererrom. Disposed with this interior cut out portion is a. rotor disc l6 having a plurality of apertures disposed around the outer-portlontherecfj Rotor it our 'rles one or more rotor contacts formed as fiat v segments with fingers 2 liextendlng from the inner edge 22M the contact. These fingers are: adapted to be bent through apertures I1 and, maintain contact 21! fiatngainst rotor IS with the edge of the contact. extending beyond the rotor edge. Rotor contact 20 mayhave an extension 23 from the outer eoige.

Stator I0 is provided with a plurality of apervportions t9 flared outwartlls' on'op'pcsit-s sang switch and the replacing or changing of any rotor havlnga plurality of contacts "mounted tures 25 disposed around out out region it. Mounted in these apertures are a plurality of etc.- tor contacts 2% comprising a lowly portion it? with a connecting portion 28 extending outwarelly from the switch and a contacting portion to extent inward iy therefrom. 'Contact 2% is tor-z ti a doubled over piece of metal with the contesting s form contacting jaws tilahrl ti. Between these laws the rotor contact Ell-ls moved sis is ant in Figure 2. Contact 26 extends toward the rotor o. greater distance than'contect 33, so that extension 23 or the rotor is gripped; icy contact as. This type of. switch is descrihecl claimeai in the copending application oi Alli. on ct sl, S. N. 53.4% filed December 9, two and signed to the same assignee.

In order to operate the rotor a. shaft 35 is provideo. This shaft has a bushing 8t carrying-g an index plate 31 having a plurality o1 struck up 'gg portions 38 thereon. The shaft itself carries a spring Ml having a pair or ball bearings ti and 42 mounted. within the spring and pressed against index plate 3?. Shaft. 35 is formed from o. eircular rcrl with opposite portions cut of? therefrom to leave two fiat skies l5 and 38 opposite each other. Rotor discs ii are provicieai apertures 41 similar in the cross-section to the shaft so that each rotor is rotatively couples to switch section, it will be impossible to three-cl shaft 35 back through the various switch sections unless the various switch sections are in correct alignment. V

While I have described the invention with respect to a. shaft having two flats and the projection at the end of the shaft on one 01' the flats, it is understood that it is not to be limited thereto. In general the shaft is of non-circular cross section and has a protuberance or bump at one point thereof.

What is claimed is:

1. An electric switch comprising a stator having a plurality of contacts mounted thereon, a

thereon, means for rotatively mounting said rotor with respect to said stator, said means including a shaft having at leastone flat along the length thereof, said shaft being readily re-- projection is disposed, whereby said shaft and rotor may be fitted together in only one position.

2. .The switch of claim 1 wherein said projection is disposed on the flat portion of the shaft.

3. An electric switch comprising at least one switch section including a stator and rotor, contacts carried by each, means for 'rotatively mounting said rotor relatively to said stator, said means including a shaft slidable in said rotor and having a pair of flats along the length thereof, a shaft having a projection from one of said flats at one portion thereof only, said rotor having an aperture shaped to correspond with the section of the shaft at the point where said projection is disposed.

4. An electric switch comprising a plurality of switch sections. means for maintaining said switch sections in spaced parallel planes, each switch section comprising a stator carrying a plurality of stator. contacts, a rotor disposed within said stator and carrying a plurality of contacts for cooperation with said. stator contacts, a shaft posing through said rotors, said shaft having at least one flat lengthwise thereof and being provided with a projection at a point thereof, each rotor having an aperture for the shaft corresponding inthe cross-section to the section of the shaft at the jeotion is located.

5. An electric switchcomprising a stator having a plurality of contacts thereon, a rotor having a plurality of'contacts for cooperation with said stator contacts, a shaft rotatively supported with respect to said stator and passing through said rotor,said shaft having a non-circular crossseotion at least at the portion passing through point where the prothe rotor for rotatively engaging the same, and a projection on the said shaft at a point thereof, said rotor aperture being provided with a notch to correspond with said projection whereby said shaft is lnsertable into said rotor in only one position.

6. An electric switch comprising a stator having a plurality of contacts thereon, a rotor having a plurality of contacts for cooperation with said stator contacts, a flat shaft rotatively supported with respect to said stator and passing through said rotor, said rotor having a slot therethrough for rotative coupling to said shaft, and a projection on said shaft at a point thereof, said rotor aperture being notched at a corresponding point whereby said shaft is insertable into said rotor in only one position.

7. An electric switch comprising a stator having a plurality of contacts thereon, a rotor having a plurality of contacts for cooperation with said stator contacts, a flat shaft rotatively supported with respect to said'stator and passing through said rotor, said rotor having a slot therethrough for rotative coupling to said shaft, and a projection at one end of said shaft, said rotor aperture being notched at a corresponding point whereby said shaft is insertable into said rotor in only one position.

8. An electric switch comprising a plurality of switch sections, means for mounting said sections in parallel planesin line with each other, each section comprising a stator and rotor, contacts carried by each, each rotor having a noncircular symmetrical aperture therethrough, a shaft passing through all of said rotors, said shaft having a cross section corresponding to said rotor apertures, means for rotatively supporting said shaft, and a projection on said shaft, each rotor being notched at a corresponding point whereby said shaft is insertable through said rotors in only one position.

9.. The switch of claims wherein said shaft is flat and has a projection at one end thereof. nwron'r rams. 

